by-pass

Definitions

from the GNU version of the Collaborative International Dictionary of English

n. A by-passage, for a pipe, or other channel, to divert circulation from the usual course.

from The Century Dictionary and Cyclopedia

n. An extra gas-pipe passing around a valve or gas-chamber, used to prevent a complete stoppage of the flow of gas when the valve or chamber is closed.

To furnish with a by-pass.

n. In wash-bottles and similar apparatus for the handling of gases, a tube with a stop-cock connecting the ingress and egress tubes, so that by opening the stopcock the gas may pass without flowing through the apparatus itself.

n. Any passage for conducting around an obstruction, such as a closed valve, a part of the fluid or material which goes through the main channel.

To permit (a liquid) to flow through an auxiliary channel, around a valve or a cylinder or back into a reservoir, instead of pursuing the usual or direct course through the main or normal channel.

She refused to believe that female Lib Dems present at a meeting were shoved and jostled by a Green activist and she didn't believe that a senior Norwich Green sent an abusive letter to my father some years ago because of his support for the Norwich Northern by-pass.